3. Contour the crease of your eye with a charcoal gray shadow. "Using a charcoal gray shade (or the gray hue from the IT Cosmetics Eye Shadow Trio plattete above), trace the crease of your eye from the outer corner to a little past the midway point of your eye," she says.

5. Fully line the inner upper and lower rim of your eyes with jet-black liner. "This is the most important step," says Cosenza. "The inky liner makes your eyes instantly pop and gives it that red carpet edge." Siobhán used L'Oréal Extra-Intense Liquid Pencil Eyeliner in "Carbon Black." Then, swipe on a few coats of mascara.